Suspention clamp are used to hang conductor or ground wire through insulator of link fitting to tower arms or substation structures. The clamp are made of malleable iron or aluminum alloy. The suspension angle of suspension clamps is not less than 25 degree, the redius of curve is not less than 8 times the diameter of the installed leads. The percentage of the grip on different kinds of leads to the calculating capicity of snap meets the international standard.
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The suspention clamp is a kind of overhead line conductors. There are also two types of suspension hardware, including tension fittings and limited grip hardware. The suspension clamp hangs or supports the conductors, primarily bearing the vertical load hardware.
The suspension clamp is used on overhead lines or substations. They can hang the conductors or arresters on the insulators or hang the arresters on the tower by the connectors. It also used for fixing and supporting the conductor and non-linear rod on the pole.
There are numorous kinds of suspension clamps. They can be classified in different method. Here are three method to classify them. Here we will introduce three ways to classify them.
Firstly, some of the abbreviations as follow: C(X)—suspension clamp, G– fixed, S—double clamp, U—U shaped screw, J—strenghthened, H—Aluminum Alloey, F—anti-corona, K—carried up type, T—carry bag type, A—with socket clevis eye, B—with U-shaped clevis, X—hang-down type.
CGU suspension clamp is als called general type suspension clamp. The fixed u-shaped screw suspension clamp(CGU) can be costomized. All specifications are avaliable with the drawings porvided. All the products meets the international standards.
The materials: Clamp and plate–forging iron; Closed pin–stainless steel; spare parts–steel
Main usage and feature
The diameter of the wire clip slot is large, when it is used for large section steel-cored alumimum conductors or conductors wrapped with pre-twisted wire sheathed grommets. If you use the common hanging plate, it is easy to cause deformation. These are the two reasons the U-shaped hanging plate is added to the upper end of the wire hanging plate. Due to such a combinaton, the bending movement of the hanging plate is reduced, and also change the direction.
Componants and materials
The socket and the socket are made of forging iron
The endfittings are stainless steel
Other mateirals is steel
All the componants are hot-dip galvanized zinc and are corrusion resistent.
Here are some main features:
Clamps have high vertical devastating load;
The cable will not get out of the clamp even in the condition of unblanced icing on adjacent gears. This means the clmaps may have enough tensile strenghth;
For the clip of the lightning conductor, the grip strength should be no less than 25% of the rated tensile strength of the steel strand, and the grip of the clip for the steel core aluminum stranded wire should be no less than 30% of the rated tensile strength of the wire.
It is used for 330kv—500kv transmission line or high altitude transmission line. This kind of clamp require high anti-corona ability. Typically, the componetns of the anti-corona type includes a flared hull, two (or four) bolts (to fasten the boat hull) and the steel hoop of the suspension part in the middle of the hull, which also known as the suspension bar type.
Materials: clamp and plate—aluminum alloy; deadend link—stainless steel; spare parts–steel
This type of anti-corona suspension clip is divided into two types: line and jumper. The jumper one also can use on substation and has weak grip.
Main features:
The axis of the hull is above the centerline of the wire, and its rotation coincides with the deflection of the wire.
Characteristics: The hull axis lies below the centerline of the wire and has a tendency to be unstable, and its rotation often exceeds the deflection of the wire.
Function: It is mainly used when the overhead ground wire is placed on the top of the tower, and when the split wire is to be arranged on the bar.
Material: clamp and plate—ZL102 aluminum alloy; deadend link— stainless steel; spare parts—steel
Material: clamp and plate—ZL102 aluminum alloy; deadend link— stainless steel; spare parts—steel
Features: high strength, strong corrosion resistance, low hysteresis loss, low energy consumption and energy saving. It is also benefit to control the generation of corona. It is widely used on 330kv to 500kv transmission line or meet the requirement of the corona production in the high altitude area.
It is used on 220kV lines to replace the commonly used malleable cast iron lines, which has good economic benefits.
The hull of the wire clip is stamped from steel plate, without hanging plate. The hanging point is above the axis of the wire, and the u-bolt is upware installed for convenient construction. The production process is simple with short cycle, high yield, light weight and few accessories, etc. it is suitlable for installing steel-cored aluminum stranded wires and aluminum stranded wires of medium and small sections.
The hull, plate and clevis is cast iron, the closd pin, and other spare parts are made by steel. We use hot-dip galvanized technic for cast iron and steel.
Hysteresis loss: Due to the magnetic material in the AC iron core coil, in addition to the power loss of the coil resistance, hysteresis and eddy current can also be generated in the alternating magnetic field, resulting in power loss and heat generation.
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If you are interested, our next passage is still about suspension clamp. We will introduce 7 other types of suspension clamp and how to choose a suitable suspension clamp.
TTF Power manufactures and supplies suspension clamps for overhead power transmission and distribution systems. Suspension clamp for ABC cable protects the conductors and other devices from aerial vibrations and swinging caused by strong winds and storms. The clamps are made from galvanized steel and aluminum alloy, which helps them to resist corrosion caused by the different weather conditions in the environment. The resistance offered helps to increase the durability of the suspension clamps for overhead lines which in turn helps to reduce the repair and maintenance life costs.
They are used together with other devices such as bolts, nuts and washers to assist in securing a connection on the overhead lines. This help to limit loose connections that may eventually lead to electrocution. These devices should be made from similar material as the conductors as they are installed near the conductors to help reduce abrasion and friction of the different devices.
The production of the cable suspension clamp may vary in functionality and operability due to the different designs, mechanical and technical abilities of each make. They are therefore used for different applications and functions in the installations of the overhead transmission lines.
Suspension clamp is not a single entity as it has some major components that make up the connection to the conductors. They are as discussed below.
Suspension clamps for overhead lines are made in different designs and models as they have different roles on the transmission lines. They are each made for a particular function which means they cannot be interchanged. These types of cable suspension clamps should be selected for specific functions for the transmission lines. If unsure, you should consider consulting an expert. The most commonly used suspension clamps include:
The design, mechanical and technical requirements of the ADSS suspension clamps define the functionalities and view of the clamp which makes it essential during the construction of the transmission lines. The well-designed OPGW suspension clamps ensure that there is a smooth coordination between the cable and other components. Some of the design aspects to be considered include:
The suspension clamp main use is to suspend the conductors hanging from the transmission lines. They ensure a safer connection of the above lines. They however have other important uses which are as follows.
The market can be a tough nut to crack when it comes to selecting which suspension clamp to purchase for your overhead transmission. But not to worry since the following factors will help when choosing the suspension clamps.
There are different suspension clamps manufactured in the market and they are used for different purposes in the transmission lines constructions. The following clamp products are manufactured by TTF Power Systems in China.
Suspension clamps are used in the overhead transmission lines to suspend or hang cables from the transmission lines. They provide protection to the conductors by reducing the swinging caused by string winds and storms.
Suspension clamps are of many types as they are used for various functions in the construction of the transmission lines. Some types include:
Suspension clamps are made from galvanized steel which helps them to resist corrosion, abrasion and rust which leads to prolonged life and little maintenance and repair costs.
Suspension clamps can be used together with the bolts, nuts, and washers to secure the connections between the conductors and other devices in the overhead transmission lines.
Suspension clamps should be able to protect the cables and should be easily and quickly installed.
Suspension clamps provide the mechanical support required irrespective of the condition of the conductor. They also help in regulating and reducing the movement of conductors in the cases of strong winds and storms.
The design and material of the suspension clamp should be considered to fit the purpose intended. The manufacturer of the product should also be considered.
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